Basic question: Object reference problem?

 
 My_val=5;global $global _obj, $global _obj->my_val=10;echo $p->my_val;  Output 5var_dump ($p = = = $global _obj);  Back to False?>

Ask why the result is 5 instead of 10;
My understanding is: in PHP5, unless you explicitly clone an object with the Clone keyword, the object will never be copied unconsciously.
Does that make sense?

Reply to discussion (solution)

Line 8th $global _obj=& $this; When
The 18th Guild has
Creating default object from empty value (creation of defaults from null values)
Warning, you blocked the error message, so you can't figure out why.

When line 8th is corrected for $global _obj = $this; When
You can output 10.

Recommended to see the http://php.net/manual/zh/language.oop5.references.php

